My Colt New Service will not shoot any light (170 -180) grain bullets to POA no matter what the load. Hoping to try some heavy weights to see if that will get it shooting where it looks.
If you cast some that heavy for the 38-40 please send me a PM!
Accurate has a 220 designed for 10mm revolver. For .38-40 you need to move the crimp groove farther out the nose so loaded round will clear the front of cylinder.